Body Fat
Calculator for Women
Estimate your body fat percentage using the Navy tape measure method. This free calculator uses circumference measurements to provide body composition insights for women.
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How This Body Fat Works
This calculator uses the U.S. Navy body fat formula for women, which factors in height, waist, hip, and neck measurements. The formula correlates well with hydrostatic weighing for most body types. Measure at the narrowest waist point, widest hip point, and below the Adam's apple for neck.
When Should You Use This Tool
Use this calculator to track body composition changes over time, especially when the scale does not reflect fitness progress. Body fat percentage is often more meaningful than weight alone. Remeasure monthly at the same time of day for consistent tracking.
Is This Tool Accurate and Safe
The Navy method provides estimates within 3-4% of clinical methods for most women. Accuracy decreases at very low or very high body fat levels. For precise measurements, consider DEXA scanning or hydrostatic weighing. All data remains private in your browser.
Frequently Asked Questions
What is a healthy body fat percentage for women?
Essential fat is 10-13%. Athletes typically range 14-20%. Fitness category is 21-24%. Average healthy range is 25-31%. Above 32% is considered elevated. Women naturally carry more body fat than men due to hormonal differences.
How accurate is the Navy body fat method?
Studies show the Navy method is typically within 3-4% of clinical measurements for most women. Accuracy can vary based on body type and measurement technique. Consistent measuring technique improves tracking reliability.
Where exactly should I measure my waist?
Measure at your natural waistline, typically the narrowest part of your torso, usually around the navel or slightly above. Keep the tape horizontal and snug but not compressing the skin.
Why does body fat matter more than weight?
Body fat percentage reflects actual body composition. Two women at the same weight can have very different body fat levels depending on muscle mass. Lower body fat with healthy muscle mass indicates better fitness regardless of scale weight.